For the block loaded triaxially as described in Prob. 223, find the uniformly distributed load that must be added in the x direction to produce no deformation in the z direction.
Shearing forces cause shearing deformation. An element subject to shear does not change in length but undergoes a change in shape.
The change in angle at the corner of an original rectangular element is called the shear strain and is expressed as
The ratio of the shear stress τ and the shear strain γ is called the modulus of elasticity in shear or modulus of rigidity and is denoted as G, in MPa.
The relationship between the shearing deformation and the applied shearing force is
where V is the shearing force acting over an area As.